Add patch to be able to use the library either from build dir of from install dir. Now VISP_SCENES_DIR, VISP_ROBOT_ARMS_DIR, VISP_HAVE_OGRE_PLUGINS_PATH, VISP_HAVE_OGRE_RESOURCES_PATH defined in vpConfig.h may contain multiple path locations separated with ; character. These locations are the one to found the resources in the build tree, and the one to found the resources in the install tree.